The Excretory System
Purpose: to rid the body of wastes, including excess water,
salts and carbon dioxide
Major Organs and Their Functions
Kidneys – the main organs of the excretory system
-- waste-laden blood enters the kidney and the
kidney filters out urea, excess water and other waste
products, which eventually travel out of the kidney as
urine
-- eventually they travel through the ureter to
the urinary bladder
Rectum – solid (food) waste travels out of the body through
the rectum
Skin – sweat glands remove excess water and salts from
the body
Lungs – expel the waste gas carbon dioxide
Image of the Excretory System
Brain Pop:
Excretion